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7288355 |
Carrier for electrophotography developers, developer prepared by using the carrier and method for forming image
Provided are a carrier for electrophotography developers prepared by generating a slight amount of byproducts such as water, alcohol, etc, which carrier is free from release of a magnetic powder,...
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7252919 |
Carrier and developer for latent electrostatic image development, container housing developer, image forming process, image forming apparatus, and process cartridge
A carrier for electrostatic development contains a core particle and a coating layer covering the core particle, and the core particle is a ferrite particle containing at least one of Zr in an...
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7183033 |
Carrier core material, coated carrier, two-component developing agent for electrophotography, and image forming method
A carrier core material for an electrophotographic developing agent, which comprises 100 parts by weight of a ferrite component represented by a formula (A) and 0.1 to 5.0 parts by weight of ZrO 2 ...
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7144669 |
Carrier and developer for latent electrostatic image development, container housing developer, image forming process, image forming apparatus, and process cartridge
A carrier for electrostatic development contains a core particle and a coating layer covering the core particle, and the core particle is a ferrite particle containing at least one of Zr in an...
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7144668 |
Toner and two-component developer
The present invention provides a toner: comprising a binder resin comprising a polyester unit, a colorant, a releasing agent, and inorganic fine particles; has a weight average particle diameter of...
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7033720 |
Development systems for magnetic toners and toners having reduced magnetic loadings
Development systems and methods for developing using magnetic toner are disclosed. The present invention further discloses developers used in development systems as well as the toner used in...
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7014971 |
Carrier compositions
Carrier comprised of a mixture of a first carrier and a second carrier, and wherein the first carrier is comprised of a steel core and the second carrier is comprised of a magnetite.
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6936394 |
Replenishing developer and developing method
An electrostatic latent image on an image-bearing member is developed with a two-component developer comprising a toner and a carrier stored in a developer vessel while supplying as required a...
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6905806 |
Dry two-component type developer for electrophotography
A dry two-component developer for electrophotography comprising a carrier particle and a toner particle, wherein a toner water adsorption ratio (T) obtained by a following equation (1) for the...
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6723481 |
Method for using hard magnetic carriers in an electrographic process
Methods for development of an electrostatic image are disclosed that utilize developer compositions with hard magnetic carrier compositions which can provide improved development efficiencies and...
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6677098 |
Developer composition for non-interactive magnetic brush development
An electrographic, two-component dry developer composition including charged toner particles and oppositely charged carrier particles which (a) includes: an combination of a soft magnetic material...
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6677096 |
Positively chargeable toner for two-component development
A positively chargeable toner for two-component development comprising a resin binder; a colorant; a releasing agent comprising a wax having a melting point of 50° to 120° C.; and an external...
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6589703 |
Electrographic methods using hard magnetic carrier particles
Disclosed are methods and apparatus for electrographic development which utilize a rotating magnetic core, a toner shell disposed around the rotating magnetic core, and developer compositions...
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6506531 |
Magnetic carrier
A magnetic carrier exhibiting excellent durability against mechanical impact as exerted by vibration and capable of exhibiting a stable charging performance in electrophotography is provided. The...
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6464797 |
Method of separating electrophotographic carrier compositions and recycling the compositions
A method for use in two-components electrostatic image developers is disclosed, in which secure separation of a carrier coating resinous materials from a core magnetic material is achieved without...
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6294304 |
Environmentally benign high conductivity ferrite carrier with widely variable magnetic moment
A ferrite carrier includes manganese oxide, ferric oxide and minor amounts of titanium dioxide and provides an environmentally benign, highly conductive, reprographic carrier powder.
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6183925 |
Two component developer comprising specific magnetic toner and specific magnetic carrier
This invention provides a two-component developer comprising magnetic carrier particles and toner particles which contain magnetic particles at a specified content, being excellent in high speed...
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5994016 |
Dry developer for developing electrostatic latent image
A color developer is described that contains a toner and a resin-coated carrier, wherein the toner contains a hydrophobic particulate titania and a charge controlling agent, and the charge...
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5976747 |
Ferrite carrier for electrophotographic developer and electrophotographic developer containing the same
A ferrite carrier for electrophotographic developers which is represented by formula: (MnO) x (MgO) y (Fe 2 O 3 ) z wherein x+y+z=100 mol %, and part of MnO, MgO and/or Fe 2 O 3 is...
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5962175 |
Binder-type carrier and method of manufacturing same
A binder-type carrier which does not cause image defects or uneven density and has excellent production characteristics, and a binder-type carrier manufactured by said method. The binder-type...
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5885740 |
Magnetite particles, a process for producing them and applications thereof
Magnetite particles that contain 0.1-5.0 wt % of P, 0.1-5.0 wt % of Al and optionally up to 5.0 wt % of Si on the basis of Fe, that have σ r /SSA ratio of no more than 0.9 (σ r , residual...
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5824445 |
Process for producing image and two-component developer
A process for producing an image comprising the steps of: electrically charging a photoreceptor under dark; forming a latent image on the photoreceptor through selective imagewise exposure to...
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5795692 |
Carrier composition and processes thereof
A carrier composition comprised of a core comprised of a magnetic oxide with a coating thereover comprised of the reaction product of a metal, preferably a zinc vapor and the magnetic oxide.
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5576133 |
Carrier for use in electrophotography, two component-type developer and image forming method
A two component-type developer for electrophotography showing improved electrophotographic performances and also free from carrier adhesion (undesirable carrier transfer to the photosensitive...
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5518849 |
Ferrite carrier for electrophotographic developer and developer using said carrier
This invention provides a ferrite carrier for an electrophotographic developer characterized in that a core material is ferrite particle composed of 17.0 to 29.0 mol % of Li 2 O and 71.0 to 83.0...
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5512404 |
Developer compositions exhibiting high development speeds
Carrier particles for an electrostatographic developer comprising a mixture of particles of a hard, magnetic ferrite material having a hexagonal crystalline structure of the general formula M0.6 Fe...
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5500320 |
High speed developer compositions with ferrite carriers
Carrier particles for an electrostatographic developer comprising particles of a hard, magnetic ferrite material having a hexagonal crystalline structure of the general formula MO.6 Fe 2 O 3 in...
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5496674 |
Particles suitable as carriers for electrophotography
Particles (I) which are suitable as carriers for electrophotography consist of a) a magnetic core and b) a shell of alumina, chromium oxide, molybdenum oxide, tungsten oxide, silica, tin...
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5494770 |
Image forming method using magnetic brush and specific carrier
A two component-type developer for electrophotography showing improved electrophotographic performances and also free from carrier adhesion (undesirable carrier transfer to the photosensitive...
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5422216 |
Developer composition and method of preparing the same
A method for preparing the carrier for a developer composition is provided. The method comprises subjecting a ferric oxide and a metal oxide to conditions sufficient to form a ferrite have a spinel...
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5401601 |
Polyesteramide-siloxane toner and developer compositions
A toner composition comprised of pigment, an optional charge enhancing additive and a polyesteramide-siloxane resin of the following Formulas I,II or III ##STR1## wherein m, n and o represent the...
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5376492 |
Method and apparatus for developing an electrostatic image using a two component developer
A two component development system includes developer with charged toner particles and oppositely charged carrier particles having high coercivity and permanent magnetism. The developer is moved...
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5358819 |
Developer for electrophotography
The object of the invention is to provide a developer for electrophotography which may present stable charging properties and image density after a prolonged period of copying operations as well as...
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5336579 |
Color developer compositions containing bare carrier cores and coated carrier cores
A developer composition containing color toner particles, bare carrier core particles and coated carrier particles.
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5310617 |
Magnetic brush developing process and developer
Disclosed are a two-component type developer which is supplied to an area where a bias voltage of at least 250 V is applied, and a developing process using this developer. In this developer, by...
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5290652 |
Developing compositions for electrophotography
An object of the present invention to provide novel developing compositions for use in electrphotography which do not cause an adherence of ferrite carriers to the surface of a photoconductor while...
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5190842 |
Two phase ferroelectric-ferromagnetic composite carrier
Disclosed is an interdispersed two-phase ferrite composite which comprises, as a ferromagnetic phase, a magnetically hard ferrite material having a hexagonal crystalline structure of the general...
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5176977 |
Nonpolymeric amorphous developer compositions and developing processes
Toner and developer compositions incorporating nonpolymeric, homogeneous, amorphous mixtures of compounds as the binder are described. The mixtures comprise at least two nonpolymeric, thermoplastic...
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5106714 |
Interdispersed two-phase ferrite composite and electrographic magnetic carrier particles therefrom
Disclosed is an interdispersed two-phase ferrite composite which comprises about 0.1 mole to about 1.0 mole of a spinel phase having the general formula MFe 2 O 4 where M is at least one element...
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5061586 |
Glass composite magnetic carrier particles
Disclosed are two-phase glass composite carrier particles which comprise a composite of a magnetically hard ferrite material having a single phase hexagonal crystalline structure of the formula...
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4925762 |
Carrier for reprography and production of this carrier
Carriers for a two-component dry developer are based on a ferrite or iron-containing core which carries a metal oxide layer consisting of reaction products deposited in the gas phase. The carriers...
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4824750 |
Toner compositions with a crosslinked resin component
A developer composition comprised of crosslinked styrene copolymers with an insoluble gel content of from about 20 to about 60 percent, pigment particles, low molecular weight wax components, first...
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4737434 |
Process for colored toners with selected triboelectric characteristics
A process for generating consistent high quality colored images for extended periods consisting essentially of (1) providing a xerographic imaging or printing apparatus; (2) adding thereto a stable...
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4698289 |
Process for making ferrite spherical particulate toner core from raw fly ash
A process for making a ferrite spherical particulate toner carrier core from a raw fly ash comprising recovering the magnetic particles from the non-magnetic particles of the raw fly ash; selecting...
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4683187 |
Dry process electrostatic developer comprising a generally round magnetic carrier and a flake-type carrier
An improved magnetic brush developer material utilizes toner material in combination with round carrier particles mixed in a particular proportion with flake carrier material. As a result of this...
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4640880 |
Electrophotographic process with magnetic brush development using semiconductive ferrite carriers
In a method of developing triboelectric magnetic toner, an electrostatic latent image is formed on a substance, the latent image is developed by a magnetic brush method using a ferrite carrier of...
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4614698 |
Two-component electrophotographic developer with magnetic carrier
A two-component electrophotographic developer for use in developing a latent electrostatic image of a low potential. The developer is composed of a mixture of a magnetic carrier of spherical...
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4600675 |
Magnetic carrier for electrostatic latent image development
A magnetic carrier is disclosed which is for use in electrographic developing method which effects development of an electrostatic latent image with a magnetic developer at a developing region by...
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4598034 |
Ferrite carriers for electrophotographic development
A carriers for electrophotographic development which comprises essentially a disintegrated powder of granules consisting essentially of the compound represented by the formula (MO) X (Fe 2 O 3...
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4592988 |
Ferrite toner carrier core composition derived from fly ash
A ferrite toner carrier core composition derived from flyash comprising a mixture of spherical particulates of the general formula ##EQU1## wherein iron is the principal metallic element and i,j,k...
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